Back-bar transfer mechanism for smut-sheeting machines



E. mLssnT AND G. w. HARRIS..- 7 BACK BAR TRANSFER MECHANISMFOR SMUT-SHEET ING MACHINES- APPLICATION FILED IUNE 7, 1920.. 1,428,025.

PatentedSept. 5, 1922.

5 SHEETS-SHEET I.

v Q I Q I k j 6:32am

J. E. GILBERT AND G. W. HARRIS.

NSFER MECHANISM F OR SMUT SHEETI'NG MA CHINES- -BACK BAR TBA APPLICATION mmwna 1. 1920.

PatentedSept. 5, 1922.

5 SHEETS-SHEET 2- (I II P Jamaal? 6,66%2, Glenn PIT-Harm's,

I. E. GILBERT AND a. w. HARRIS. BACK BAR TRANSFER MECHANISM-FOR SMUT SH'EETING MACHINES- APPLICATION FILED JUNE 7, I920.

Patented Sept. 5, 1922.

5 SHEETS-SHEET 3.

6km J J. E. GILBERT AND G. W. HARRIS BACK BAR TRANSFER MECHANISM FOR 'SMU T SHEETING MACHINES APPLlCATiON FlLl' ID {UNI-i1, i920. I Q 1,428,025 Patentedsept. 5,1922.

1 1 mulm JIMW J. E. GILBERT AND G. W; HARRIS.

BACK BAR TRANSFER MECHANISM FOR SMUT SHEETING MACHINES.

APPLICATION FILED JUNE 7, 39 20.

1922. 5 SHEETS-SHEET 5.

Patented Sept 5,

Jam if QZZ S T Zem 7,

?atented Sept, 5, i922.

JAMES E. ertnnn'r is]; new w. rec iners," or: enroaeo, rttrnors. v

BAGK-BARTRANSFER innonanisivr iron" stroar snnn'rme MACHINES;

Application filed June 7, 1920. Serial No. 387,257.

To all whom it may concern:

Be it known that we, JAMES E. GI BERT and GLENN W. Harms, citizens of the United States residing at Chicago, county 05300011, and State of Illinois, have invented a certain new and useful Improvement in Bacle Bar Transfer Mechanism. for Smut-Sheet:

Machines, of which the follow'ingfis a specification. c c

Patent Number 966,739 to J. E. Gilbert issued August 9,1910, illustrates and claims a machine for taking care of sheets of printed or lithographed matter between the time they receive the impression of ink and the time they are suiiiciently dried to prevent offsetting when placed on a pile. Broadly speaking, that machine includes the use of an intermittently moving and successively folding strip of cloth between which successive sheets of printed paper are placed immediately on being printed, and in which they are carried until sufliciently, dried to be automatically delivered from the machine, all as will more fully appear from the in spection of said patent. The successive portions of cloth between which the paper is'held are divided or marked one'from another bycross bars 52 which in the operation of the machine slide downward through guides or channels 4% and 45 as fully set forth in, said patent and when released from the bottoms of said guides they travel. with the cloth back to points above the tops of the --respective guides.

I As shown in said. patent (Figure 8) when the portion of the cloth carrying the bar arrives over the rear vertical. guide 46. the cross bar is a considerable distance 'abovethe upper end of the vertical guide and mechanism shown in that patent has to be pro vided for moving the bar down into the guide while the roller 69 is in the position shown in Figure 3 and'before it begins to move to the right, as viewed in that figure,

fully set forth in that patent.

The object of this'invention is to provide an improved mechanism automatically operated by the machine for-traveling up and grasping the bar on the cloth in the position described, moving the bar down and latching it into the vertical guide and then repeating the operation with the next bar that comes to proper position above the'guide.

The invention consists in mechanism for carrying out this and other objects, which of: Figure 6 can be comparatively easilybuilt and inf stalled in the machine,iwhich is more posi-' tive in operatio1rthan previous devices therefore more satisfactory inoperation and which is not liable to get out of vorder; lvioreparticularly the invention consists in many features and details of construction hereaftermore fullyset forth in the speci fication and claims. i I

Referring to the drawings in which like numerals denote like parts throughout the several views Figure llisa sideelevation ofso much of a machine of the typecillustrated in said prior patent as appears necessarycto'make the invention clear.

fFigure 2 is a plan view of the essential f portion of the'machlne taken at the right hand half of Figurel. f

FigureB isan enlarged side view of a mechanism cat-the upper right hand corner of Figure 1, part of the frame being broken away to show the desired parts in detail.

Figure 4 isa fragmentary plan view ,ofa track appearing in the left hand upper quarter of Figure 2 showing the details of the parts which are broken "away in Figure2. c

Figure 5 is a slightlychanged position back view'of the bar gripping and carrying mechanism shown in the left hand half of Figure2, c m -J Figure 6-is a very slightly changed position enlarged front view of the same mocha nism as shown in the left hand half of Figure 3, the same being a reversed view in y slightly changed position of-Figure oo.

Figure 7 is a sideview of the mechanism section. i I

certaiu parts being shown in Figure 8 isafront (view-of the gripping mechanism in the extreme upper position which it'assumes in going after a crossbar to transfer it into the vertical guides.

Figure 9 is a changed position of the essential parts of Figure 8 showing their conedition in the lowest' position which they assunie in delivering. a: bar to a ve rtical guide. a Figure 10 is a fragmentary view 'ofthe mechanisms of Figures 8 and 9, in the posi tion of Figure 9 showing latches 9% attached tothe vertical guides. i y

' Figure 11 1s a sectional detail plan view on The mechanism of this invention is shown applied to a modern machlne of the type se theline 11*11 of Figure 9. c

forth in said prior Gilbert patent carried on oppositely disposed parallel side frames 16, only one of which appears in Figure 1, in which are located vertical guides 18 and 20, within which the cross bars 22 carried by the cloth 2% slide vertically in the smutting operation, as heretofore referred to, in

this position the machine automatically refl moves a bridge piece 36 from across a slot 38 so that the bar can be grasped by the mechanism of this invention and carried down into the vertical guides 20. r 7

Much of the mechanism thus far de scribed is more fully shown, described and claimed in our prior application Serial No. 370,261, filed March 2]., 1920.

As fully set forth in said prior Gilbert patent and as shown in plan view in Figure 2' the guides 20 (one on each side of the ma chine, but only one shown) are of U-shaped or channel shaped cross section so that the ends of the bars 22 lying horizontal rest in them and are held against movement in any horizontal direction while they move vertically through the guides downward through the machine. As shown in Figures 1 and 3, each such guide 20 extends upward in the frame of the machine to a pointin pro imity to but at a distance sufiiciently below the upper horizontal section of tract: 32 and itsslot 38, heretofore referred to so that the rollers 26 can pass backumrd and forward on track 32 over the guide.

20 as required by the law of the main ma chine.

Enclosing the three solid sides of the guide 20 is a U-shaped cross head l-O having on its lower central portion a. stud -12 to which is attached a connecting rod 414-. driven by a lever l6cam mechanism a8-actuated by the power shaft 50 of the machine with the result that the cross head is reciprocated up and down the guide 20 in proper timing to perform the functions described hereafter as they should occur in the complete automatic operation of the machine. This cross head 40 also carries another stud 52 to which is connected a lever mechanism which automatically operates the bridge piece 36, heretofore referred to.

Rigid with opposite sides of the cross head 40, in the particular case here illustrated, made separable and secured thereto by screws 56, are upwardly rising relatively thin wing plates 58 separated one from the other bvthe width of the channel pening in the guide 20 against whose front flange edges they slide. in other .vords, these plates 58 overlap the front edges of the cross head suliiciently to engage the front edges of the side flanges of the guideand thus prevent the cross head from slipping oil from the guide in the act of reciprocating.

The main function, however, of plates 58 is to afford mounting facilities for latch mechanisms which are required in the carrying out of the main objects of this invention Each wing plate 58 is provided with a pivot pin or stud 60 located near the cross head 40 proper and a guiding pin 62- located near the upper end of the wing plate where the bar gripping function is to be performed. concentrically mounted upon each pivot pin 60 are two levers, one of them 64: carrying at its upper end what will be for convenience designated the overlapping latch 66, the other lever 68 carrying at its upper end what will be for convenience designated an underhwping latch Tl). Both of these levers are entered by the guide pin 62 through elongated slots 72 formed in the levers to allow lateral rocking of the lovers transversely of the guide pin.

The lower end of lever 6% is pressed outwardfrom the cross head by a compression sp ring '74 bearing against a. flange it; on the lever. Similarly the lower end of lever 08 is pressed outward from the cross head by compression spring 78 hearing against a flange 80 on the lever. The result of this construction is that both levers 6st and GS and consequently their latches 66 and normally at all times assume the position shown in Figures 5, 6 and 8. Lever Gel always remains in this position except when its upper angularly inclined face 82 forced against a cross bar 22 on track 32 as the cross head is moving the partsup to the position ofFigure S in which case just before the mechanism reaches that position. the overlapping latch 6 is automatically sprung incitward away from the ("'iOfiS bar 22 and toward. the adjacent wing plate 5?; sufficiently to allow the overlapping latch 66 to snap over the bar with the result that the two opposite overlapping latches grasp the top of the bar under the action of springs 74 as shown in thefigures. I

On the other hand the lower end of each lever 68 is provided wih a cam stud at and roller 86 adapted when the parts approach and reach the position of Figure 9 and ii dotted line position of Figure 5 cout' withan adjacent bracket cam 88 rigidly cured on the guide 20 by any suitable means as for instance the screws 90. This cam face 88 is so shaped and located with reference to the travel of the cross head and attached parts that the under lapping la ch sustains the cross bar 22 from the time it is grasped, while on the track 32, until it has been carried down to a proper predetermined position adjacent to the top of the pile of previously deposited cross bars 22 in the guide 20, whereupon the roller 86 engages the cam 88 and causes the underlap ping latch 70 to move to the position of Figure 9 where it entirely clears the bar for purposes which will be hereafter made apparent. v

Projecting from each side flangeofthe guide is a pivot pin 92 on which is mounted, for lateral rocking movement,- a latch dog 94, let into a suitable recess 96, formed in the adjacent edgeof the flange of the guide. This ,dog 94 is spring pressed toward the center of the guide 20bysp'ring 98. In the particular case here illustrated;

has passed the teeth 104 and thus this spring is secured to oneside' of the guide by screws 100 and has its free end engaging across lug 102 projecting from the side of latch dog 94. Therefore this cross lug limits the movement of the tooth 104 of the latch dog 94 inside the guide 20. y The latch mechanisms 94104 one on each side ofthe guide are so located that they will be forced open against the action of springs 98 by a downwardly passing bar 22 and willthen spring back over the top of saidbar after it positively retain it in the guides. s 1

1 As soon as these latch teeth 104 take hold of the freshly deposited bar 22, the underlapping latches which supported the bar in its downward movement to this point cannot begin to move upward while in their latched position without shearing the bar between the two latches. It is therefore necessary in order to return the cross head including the underlapping latches 70 to the position of Figure 8, to-bring down a new bar that at the bottom ,of'the' stroke these underlapping latches 70 get out of the way of the recently deposited bar now held by teeth 104 and stay out of its way until they have passed above it. This. result is accomplished by so shaping the cam mecha nism 88 that the levers 68 with their underlapping latches 70 swing to the position of Figure 9 at the moment the downward movement of the mechanism forces the descending cross bar 22 into engagement with the latches 104 and retains the latches 70 inthat In the complete operation offthe device,

overslot 38. At this time the cam ,mecha T nisms connected with shaft 50 start the cross head 40 upward. This causes lever mechanism 54 to withdrawthe bridgepiece 36 from below: the bar as fully set forth-in our said prior applicationybut before this is completed so that the bar can fall through slot 38 the overlappinglatches fifiengage the baron theirrinclined faces 82 and snap over the sidesof the bar into the'position shown in Figure 8., Further rotation of shaft 50 now causes cross ,head40 to descend-finally reaching the position of Figures 9 and 10 whereintheglatch' teeth .104 snap over the top of the bar to retain it in theguide so that it can neither turn over sideways nor return upthe guide, and the underlapping latches 70 are withdrawnfrom beneath the bar and .held by. cams 88 in this position until on the return stroke of the cross head these underlapping latches 70 are safely above the previouslydeposited bar wheh they spring back to normal position ready control, a temporarysupport for the bar at, a polnt remotefrjom the end of the gu1de,

a bar carrier movable between, the support and gulde bar gripping mechanism on the carrier, means for 1 moving. the bar barrier between two positions in, one of which'it grasps the bar on the temporary support, and in the other of which [it leaves thebar under control of the guide,'and automatic means operating the bar gripping .Inechanismonapproaching the last mentionedposition to disengage it from the bar and permit it to returnto the first position without interference by" the delivered bar.

2. Inmechanism of the vclass'described a guide along which abar maytravel, a bar adapted for travel along the gulde under its control, a temporaryfsupport for the bar at a point remote from the end of the guide a bar carrier movable between the sup port and guide, bar gripping mechanism on the carrier means for moving the bar carrier between two positions in one of which it grasps the bar on the temporary. support, and inthe other of which it leaves the bar under control of the guide, automatic means operating the bar gripping mechanism on approaching the last mentioned position to disengage'it from the bar and permit-it to return to the first position without in ference by the delivered banand' latch mechanism in connection with the guide, adapted to automatically engage the delivered bar operative as the carrier gripping mechanism releases the bar to hold it with reference to the guide.

8. In mechanism of the class described, a guide along which a bar may travel, a bar adapted for travel along' theguide under its control, a temporary support for the bar at a point remote from the end of the guide, a bar carrier reciprocatable along the guide toward the support, bar gripping mech anism on the carrier, means for moving the bar carrier between two positions in one of which it grasps the baron the temporary support and'in' the other of which it leaves the bar under control of the guide, and auto matic means operating the bar grip-ping 0 mechanism on approaching the last mentioned position to disengage it from the bar andpermit it to return to the first position without interference by the delivered bar. 4. In mechanism of the class described, a guide along which a bar may travel, a bar adapted for travel along the guide under its control, a temporary support fortlie bar at a point remote from the end of the guide, a bar carrier reciprocatable' along the guide toward the support, bar gripping mech anism on the carrier, means for moving the bar carrier between two positions in one of. which it grasps the bar on the temporary support and in the other of Which it leaves the bar under control of the guide, automatic means operating the bar gripping mechanism on approaching the last men 'tioned position to disengage it from the bar and permit it to return to the first position 40 without interference by the delivered bar, and latch mechanism in connection with the guide, adapted to automatically engage the delivered bar operative as the carrier gripping mechanism releases the bar to hold it with reference to the guide.

In mechanism of the class described, a vertical guide down which the end of a bar may travel, a' bar adapted to so travel by gravity, a temporary support for the bar above and clear of the guide, a bar carrier, bar gripping mechanism on the carrier, means for moving the bar carrier between two positions in one of which it grasps the bar on the temporary support and in the other of which it leaves the bar under control of the guide, and 'auton'iatic means operating the bar gripping mechanism on approaching the last mentioned position to disengage it from the bar and permit it to return to the first position without interference by the delivered bar.

7 6. In mechanism of the class described, a vertical guide down which the end of a bar nay travel, a bar adapted to'so' travel by ity, a temporary support for thebar above and clear of the guide, a bar carrier, bar gripping mechanism on the carrier, means for moving the bar carrier between two positions in one of which it grasps the bar on the temporary support and. in the other of which it leaves the bar under control of the guide, automatic means operating the bar gripping mechanism on approaching the last mentioned position to disengage it from the bar and permit it to return to the first position without interference by the delivered. bar, and latch mechanism in connection with'the gui he adapted to automatically engage the d ered bar operative as the carrier mechanism releases the bar to hold it reference to the guide.

7. In mechanism of the class described, a guide along which a bar may travel, a bar adapted-for travel along the guide under its control, a temporary support for the bar at a point remote from the end of the guide, a bar carrier movable between the support and guide, spring actuated bar mechanism onthe carrier adapted to engage two opposite sides oif a bar, means for moving the bar carrier between two positions in one oi which it grasps the bar on the temporary support, and in the other of which it leaves the bar under control of the guide, and automatic means operating "the bar gripping mechanism on approaching the last men tioned position to disengage it from the bar and permit it to return to'the first position without interference by the delivered bar.

8. In mechanism of the class described, a guide along which a bar may travel, abar adapted for travel along the'guide under its control, a temporary support for the bar at a point remotefrom the end or" the guide, a bar carrier movable between the support and guide, spring actuated bar gripping mechanism on the carrier adapted to engage two opposite sides of a bar, means for moving the bar carrier between two positions in one of which it grasps the bar on the temporary support, and in the other Of which it leaves the bar under control of the guide, automatic means operating the bar gripping l'l'lGCllitIl'lSll'l on approaching the last mentionedposition to disengage it from the bar and permit it to return to the first position without interference by the delivered bar, and latch mechanism in connection withthe guide, adapted to automatically engage the delivered bar opera tive as the carriergripping mechanism releases the bar to hold it with reference to the guide;

9. In mechanism or" the class described,

guide along which a bar may travel, a bar adapted for travel along the guide under its control, a temporary support "for the bar at a point remote from the end of the guide,

a bar carrier reciprocatable along the guide toward the support, spring actuated bar gripping mechanism on the carrier adapted to engage two opposite sides of a bar, means for moving the bar carrier between two positions in one of which it grasps the bar on the temporary support and in the other of which it leaves the bar under control of the guide, and automatic means operating the bar gripping mechanism on approaching the last mentioned position to disengage it from the bar and permit it to return to the first position without interference b the delivered bar. 10. In mechanism of the class described, a guide along which a bar may travel, a bar adapted for travel along the guide unoer its control, a temporary support for the bar at a point remote from the end of the guide, a bar carrier reciprocatable along the guide toward the support, spring actuated bar gripping mechanism on the carrier adapted to engage two opposite sides of a bar, means for moving the bar carrierbetween two positions in one of which it grasps the bar on the temporary support and in the other of which it leaves the bar under control of the guide, automatic means operating the bar gripping mechanism on approaching the last mentioned position to disengage i from the bar and permit it to return to the first position without interference by the delivered bar, and latch mechanism in connection with the guide, adapted to automatically engage the delivered bar operative as the carrier gripping mechanism releases the barto hold it with reference to the guide. I

11. In mechanism of the class described, a vertical guide down which the end of a bar may travel, 'a bar adapted to so travel by gravity, a temporary support for the bar above and clear of the guide, a bar carrier, spring actuated bar gripping mechanism on the carrier adapted to engage two opposite sides of a bar, means for moving the bar carrier between two positions in one of which it grasps the bar on the temporary support and in the other of which it leaves the bar under control of the guide, andautomatic means operating the bar gripping mechanism on approaching the last mentioned position to disengage it from the bar and permit it to return to the first position without interference by the delivered bar.

12. In mechanism ofthe class described, a vertical guide down which the end of a bar may travel, a bar adapted to so travel by gravity, a tempo'rarysupport for the bar above and clear of the guide, a bar carrier,

spring actuated bar gripping mechanism on the carrier adapted to engage two opposite sides of a bar, means for moving the bar carrier between two positions in one of which it graspsthe bar on the temporary support and in the other of which it leaves the bar forth.

poses set forth.

under, control of the guide, automatic means operating the bar gripping mechanismon approaching the last mentioned position to disengage it from the bar and permit it to return to the first position without interference by the delivered bar, and latch mechanism in connection with the guide, adapted to automatically engage the delivered bar operative as the carrier gripping mecha nism releases the bar to hold it with reference to the guide. c

13. In mechanism of the class described, a stationaryguide member for a bar, a cross head moving parallel to the guide member and reciprocatable lengthwise thereof, a pair of latch members carried by the cross head on each side of the guide, in position to hold a bar while it-is traveling guided by said guides, one member of each pair of latches being positioned to overlap a bar,

the other member ofeach pair of latches bein'gadapted to underlap a bar, yielding mechanism normally holding all of the latches in said respective positions, means for reciprocating the cross head along the guide, and cam mechanism carried by the guide engaged by the second mentioned set of leverson the cross head in a given position' of movement of the cross head, to antomatically move said second set of latches out of the way of a bar previously carried between saidlatches, for the purposes set 14. In mechanism of the class described, a stationary hollow guide member adapted to be entered by a bar for guiding purposes, a cross head moving parallel to the guide member and reciprocatable lengthwise thereof, a pair of latch-members carried by the cross head on each side of the 7 guide in position to lholda barwhile it is travelling guided by said guide, one member of each pair of latches being positioned to overlap a bar, the other member of each pair of latches being adapted to underlap a bar, yieldingmechani'sm normally holding all of the latches in said respective posiby the guide engaged by-the second mentioned set of levers on the cross head in a given position of movement of the cross head, to automatically move said second set of latches out of the way of abar previously carried between said latches, for the pur- 15. In mechanism of the class described, a vertical stationary guide member ofchannel crosssection adapted to have the end of a bar pass by gravity down its interior, a cross head moving parallel to the guide member and reciprocatable lengthwise thereof, a pair of latch members carried by thecross head on eachside of the guide,inposition to hold a bar while it is travelingguided by said guide, one member of each pair of latches being positioned to overlap a bar, the other member of each pair of latches being adapted to underlap a bar, yielding mechanism normally holding all of the latches in said respective positions, means for reciprocating the cross head along the guide, and cam mechanism carried by the guide engaged by the second mentioned set of levers on the cross head in a given position of movement of the cross head, to automatically move said second of latches out of the way of a bar previously carried between said latches, for the purposes set forth.

16. In mechanism of the class described, a stationary guide member for a bar,,a cross head moving parallel to the guide member and reciprocatable lengthwise thereof, a ,pair of latch members carried by the cross head on each side of the guide in position to hold a bar while it is traveling guided by said guide, one member of each pair, of latches being positioned to overlap a bar,the other member of each pair of latches being adapted to underlap a bar, yielding mechanism normally holding allot the latches in said respective positions, means for reciprocating the cross head along the guide, and cam mechanism carried by the guide engaged by the second mentioned set of levers on the cross head in a given position ofmovement of the cross head, to automatically move said second set of latches out of the way eta-bar previously carried between said latches, and latches carried by the guide, operative to said last mentioned position to prevent retreat movement of the bar-in the guide.

17. In mechanism of the class described, a stationaryhollow guide member adapted to be entered by a bar for guiding purposes, a cross head moving parallel to the guide member and reciprocatable lengthwise thereof, a pair of latch members carried by the cross headon each side of the guide, in position to hold a bar while it istraveling, guided by said guide, one member of each pair of latches being positioned to overlap a bar the other member of eachpair of latches being adapted to underlap a bar'yiclding mechanism normally holding all or the latches in said respective positions, means for reciprocating the cross head along the guide, and cam mechanism carried by the guide engaged by the second mentioned set or levers on the cross head in agivenposition of movement of the cross head, tosautomatically move said second setoif latchesout of the way of a bar previously carried between said latches, and latches carried by the guidesoperative at said last mentioned pos 1t 1onto preventretreat movement of the bar in theiguide.

18. lnmechanism ofthe class described, a

verticalstationary guide member of channel cross section adaptedto have the end of a bar pass by gravity down its interior,a cross head inoving parallel to the guide member and reciprocatable lengthwise thereoha pair of latch members carried by the cross head on each side of the guide in position to hold a bar while it is traveling guided by said guide, one member of each pair of latches being positioned to overlap a bar, the other member of each pair of latches being adapted to underlap a bar, yielding mechanism normally holding all of the latches in said respective positions, means for reciprocating the cross head along the guide, and cam mechanism carried by the guide engaged by the second mentioned set of levers on the cross head in a given position of movement of the cross head to automatically move said second set of latches out of the way of a bar previously carried between said latches, and latches carried by the guides operative at said last mentioned position to prevent retreat movement of the bar in the guide.

19. In mechanism of the class described, a guideopen at one end and along its length so that a bar may traverse said opening, a bar adapted for travel along the guide under its control, a temporary support for the bar at a point remote from the openend of the guide, a bar carrier reciprocatable along the guide toward the support, spring actuated bar gripping mechanism on the carrier adapted to engage twoopposite sidesof the bar means for moving the bar carrier between two positions in one of which it grasps the bar on the temporary support and in the other of which it still grips the bar now under control of the guide, and automatic means operating the bar gripping mechanism at approximately the last mentioned position to disengage it from the bar and permit it to return to the first positionwithout interference by the delivered bar.

20. In mechanism of the class described, a guide open. at one end and along its length so that a bar may traverse said opening, a bar adapted for travel along the guide under its control,-a temporary support for the bar at a point remote from the open end of the guide, a bar carrier reciprocatable along the guide toward the support, spring actuated bar gripping mechanism on the carrier adapted to engage two opposite sides of the bar, means for moving the bar carrier between two positions in one of which it grasps the bar on the temporary support and in the other of which it still. grips the bar now under control ofthe guide, and automatic means operating the bar gripping mechanism at approximately the last mentioned position to disengage it from the bar and permit it to return tothe first positionv without interference by the delivered bar, and latch mechanism in connection with the guide,-adapted-to automatically engage the delivered bar operative as the carrier gripping mechanism releases the bar to hold of the channel, and means limiting such it with reference to the guide. movement. i p p 21. In mechanism of the class described, a In witness whereof we have hereunto subchannel shaped guide through whose open scribed our names.

5 side the end of a bar is adapted to pass, a pair of latch levers pivoted 0n the opposite "o side walls of said channel provided with latch teeth projecting into the path of a bar Witnesses: traveling down the channel, spring means WALLACE P. ALLEN,

10 urging said latches inward toward the center A. HAPTULLER. 

